8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille 6in diameter + Product Details Size -

+ Product Details Size - 20"w X 36"h is the size for the duct opening measurement only

1/4" - 6518 PSI

These Supply Diffusers with integral round necks are recommended for heating

actual front end outer dimensions are approximately 14 5/8" width X 32 5/8" height

actual front end outer dimensions are approximately 16 5/8" width X 38 5/8" height

8" x 10" or 10" x 8" Cube Core Eggcrate Return Air Grille 6in diameter + Product Details Size -+ Product Details Size 8" x 10" or 10" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" X 11. 75". High Quality High quality, rust free aluminum construction with smooth finished edges and counter sunk screw holes (screws included); no sharp edges.. Installation Location sidewall and ceiling. Design Cubic core eggcrate design Offers highest airflow efficiency at almost 95%, reducing